/** {@inheritDoc} */
 @Override
 public void saveUserDisposition(List<Disposition> disposition) {
   List<List<Disposition>> dispositions =
       PreferencesProvider.Preferences.Layout.getLandscapeUserDispositions(getActivity());
   dispositions.add(disposition);
   PreferencesProvider.Preferences.Layout.setLandscapeUserDispositions(
       getActivity(), dispositions);
 }
 /** {@inheritDoc} */
 @Override
 public void deleteUserDisposition(int position) {
   List<List<Disposition>> dispositions =
       PreferencesProvider.Preferences.Layout.getLandscapeUserDispositions(getActivity());
   dispositions.remove(position);
   PreferencesProvider.Preferences.Layout.setLandscapeUserDispositions(
       getActivity(), dispositions);
 }
 /** {@inheritDoc} */
 @Override
 public List<List<Disposition>> getUserDispositions() {
   return PreferencesProvider.Preferences.Layout.getLandscapeUserDispositions(getActivity());
 }